Offset tool holder



1,635,437 July 12. 1927 J. RYAN OFFSET TOOL HOLDER Filed Deo. 8. 1925)ff/@55s By Patented July 12.,l 1927.

'A UNITED STATES JEREMIAH RYAN, or .sYRAcUs-e, NEW YORK.

OFFSET TOOL HOLDER.

Application mea December s, 1925. seriai No. 74,009.

- This invention relates to an offset tool holder of the hand operatedtype for retary tool holder and a rotary handle jouris capable ofreceiving different naled ina connecting yoke at right angles to eachother and geared together for transmitting rotary motion from the handleto the tool holder so that the yoke with the tool holder thereon may beadjusted angularly about the axis of the handle to operate upon a screw,bolt, or nut in any d1- rection at right angles to said axis.

The main'object is to provide a simple implement of this charactercapable of being or rather one which kinds of tools according to thenature of the work.

Another object is to arrange the tool holder wholly to one side of theaxis of the handle except as it may be turned about said axis.

A further object is to provide the device with means within convenientreaching disused for many purposes l tance of the handle for operating asuitable work-engaging chuck to open and close the same -upon vthe workas may be required.

A further object is to utilize one of the gears as a tool chuck inaddition to its function for transmitting motion from the handle-.to thetool. i

Other objects and uses relating to specific parts of the device will bebrought out in the following description.

In the drawings:

Figure l is a side elevation of an offset tool holder embodying thevarious features of my invention as applied to a screw-driver,

Figures 2, 3, and 4 are longitudinal sectional views of the connectingyoke and gears between the handle shaft and tool shaft showing differentforms of tools which may be attached to one and the same gear chuck.

As illustrated, this device comprises a yoke 1 having terminal journalbearings -2- and 3 at right angles to each other for receivingrespectively a hand ro-` tated driving shaft or spindle -4- and a driventool spindle -5- which are also disposed at right anglesl to each otherwith their .axes intersecting at a vcommon point.

The driving shaft or spindle-4 is provided with a co-axial handle-G- bywhich it may be rotated somewhat in the manner of a screw-driver. Abeveled gear -7-f is secured to the other end of the driving shaft orspindle -4- to abut against the adjacent end of the bearing.

This gear -7'- meshes with a companion beveled gear -8- which is securedby a set screw -9- to the inner end of the tool shaft or spindle -5-,.

This gear -8- and its clamping member -9- therefore serves as a chuckfor receiving the tool spindle -5- which, as illustrated in Figures 1and 2, is provided with a screw-driver tip -10 wihile in Figure 3 asimilar tool shaft or spindle -5- is provided with a socket -10 adaptedto beJ used for tightening and loosening'b'olts, nuts, and the like.

In Figure 4 the tool spindle as 5- is connected by a universal joint-11- to a supplemental tool spindle -10 shown as having a socket -,10-similar to that shown in Figure 3 for tightning and loosening nuts,bolts, and the like, although it is evident that the spindle 10- may besubstituted by the screw-driving spindle -5- shown in Figures l and 2,if desired.

The gears -7- and\-8- engage the adjacent ends of their, correspondingbearings -2- and -3- to hold their respective shafts against endwisemovement in one direction, the other ends of the bearings-2- and .-3-being engaged -'respectively by lcollars -7- and -8-.

When the device is used as an oEset screwdriver, the screw-drivingspindle -'5-e: is provided with a screw supporting sleeve l2- slidablethereon and having its outer end provided with a plurality of, in thisinstance, three spring jaws 13 projecting from the outer end thereofincircumferen'- tially spaced relation for receiving and supporting thehead of a screw as to be operated upon by the member l0- The purpose inmoving the sleeve l2- axially upon the spindle -5- is to permit theinsertion of the head of the screw between the jaws when the sleeve ismoved outwardly and to cause the screw-driver to expel the screw fromthe jaws when the sleeve is moved inwardly.

The means for moving the-sleeve l2-y axially on the spindle -5- consistsof a bellcrank lever +14- pivoted at -15- to' the yoke -1 and having itsshorter arm connected by a link -16- and pivotal screw 17 to theperiphery of the sleeve --12-.

The other arm of the bell-crank lever 14- exten-ds lengthwise of theshaft 4 along one side of the handle -6 where it is free and is easilyengaged by the same hand which holds the handle end of the spindle 4thereby facilitating the operation of said lever 14- and resultantadjustment of the sleeve -12- to different po-y sitions for receivingand ejecting the work, such ,as the screw a-.

, It will be observed that irn each of the modifications the gear -8-arid its screw -9 s'erves asa tool chuck for holding different forms oftools such as the screw-driver spindle -5- and socket wrench spindles"5- and 5- thereby extending the range` of use of the device withoutadding extra parts for holding the various tools.

It will also be observedqiat the tool might be reversed end'for end 1nthe gear chuck -8- without departingfrom the spirit 'of this inventionand that in either position' of adjustment it has the further advantageof being rotatable bodily about the axis of the driving spindle -4thereby furtherincreasing its range of usefulness.

In operation of the screw-driving device.

shown in Figures 1 and 2, if it is desired to `insert a vscrew intowood. at an angle to the shaft -4-, the free end of the lever 14+ may bedepressed by the thumb of the hand engaging the handle -6-- therebyforcing the sleeve l2- outwardly and permitting the head of the screw tobe inserted between the jaws -13- where it will be temporarily heldunder the tension of said jaws.

The free end of the lever is then returned by the fingers of the handengaging the han'- dle -6- to engage the tip -10- of the screw-drivingspindle 5- with the end face of the screw head So that by rotating thehandle -6- and screw spindle -5- the tip -10 will be registered with'theslot in the head of the screw so that the continued rotation of thehandle 6'- will cause the screw to enter the work. Y

Reversing the direction of rotation of the handle -6-- will effect asimilar reversing of rotation of the spindle -5 for withdrawing thescrew -abut in either case when it is desired vto release the screw orto release the jaws l-.- from the screw the free end of the lever -14-,will be shifted to the position indicated by vdotted lines in Figure lthereby effecting a corresponding movement 'of the sleeve 12'- to ejectthe screw from the jaws --13-.

lVhat I clail. is :j

An offset tool holder comprising a yoke having journal bearings at rightangles to each other, a spindle journaled in one of said bearings andhaving at one end a co-axial handle by which it may be turned and at itsopposite end a gear, a tool spindle journaled in the other bearing andhaving at one end a gear meshing with the first-named gear and at itsopposite end an axial movable sleeve provided with spring jaws normallytensioned for yieldingly holding the work, a bell-crank lever pivoted tothe yoke and provided with a relatively long arm extending along thefirst-named spindle and handle, and a link connecting the other arm ofthe lever with the sleeve for transmitting motion from the lever to thesleeve.

In witness whereof I have hereunto set my hand this l25th day ofNovember, 1925.

JEREMIAH RYAN.

